JAVA实现获取MAC地址
获取MAC地址是通过Java程序来获取设备的物理地址，MAC地址是网卡的唯一标识符，用于在网络中唯一地标识一个设备。
Java中获取MAC地址的实现方式有多种，下面将介绍几种常用的方式：
1. 使用InetAddress类和NetworkInterface类
```java
public class GetMacAddress
public static void main(String[] args)
try
InetAddress ipAddress = LocalHost(;
NetworkInterface networkInterface = ByInetAddress(ipAddress);
byte[] macAddressBytes = HardwareAddress(;
StringBuilder macAddressBuilder = new StringBuilder(;
for (int i = 0; i < macAddressBytes.length; i++)
macAddressBuilder.append(String.format("%02X%s", macAddressBytes[i], (i < macAddressBytes.length - 1) ? "-" : ""));
}
String macAddress = String(;
System.out.println("MAC Address: " + macAddress);
} catch (UnknownHostException ， SocketException e)
e.printStackTrace(;
}
}
```
这种方法通过获取本机的InetAddress对象，然后通过该对象获取对应的NetworkInterface对象，再通过该对象获取硬件地址（MAC地址），最后将硬件地址格式化成常见的xx-xx-xx-xx-xx-xx形式。
java jna
2. 使用Java 6新增的NetworkInterface类
```java
import java.util.Enumeration;
public class GetMacAddress
public static void main(String[] args)
try
Enumeration<NetworkInterface> networkInterfaces = NetworkInterfaces(;
while (networkInterfaces.hasMoreElements()
NetworkInterface networkInterface = Element(;
byte[] macAddressBytes = HardwareAddress(;
if (macAddressBytes != null)
StringBuilder macAddressBuilder = new StringBuilder(;
for (int i = 0; i < macAddressBytes.length; i++)
macAddressBuilder.append(String.format("%02X%s", macAddressBytes[i], (i < macAddressBytes.length - 1) ? "-" : ""));
}
String macAddress = String(;
System.out.println("MAC Address: " + macAddress);
}
}
} catch (SocketException e)
e.printStackTrace(;
}
}
```
这种方法通过使用NetworkInterface类的getNetworkInterfaces(方法获取所有的网络接口，并逐个检查每个接口是否有硬件地址（MAC地址），如果有则进行格式化输出。
3. 使用JNA（Java Native Access）库
JNA是一个用于在Java中调用本地（原生）方法的类库，可以用于获取MAC地址等系统级别的操作。
首先需要添加JNA依赖：
```xml
<dependency>
<groupId>net.java.dev.jna</groupId>
<artifactId>jna</artifactId>
<version>5.7.0</version>
</dependency>
```
实现代码如下：
```java
public class GetMacAddress
public interface CLibrary extends Library
CLibrary INSTANCE = Native.load(Platform.isWindows( ? "iphlpapi" : "c", CLibrary.class);
int getAdaptersInfo(byte[] pAdapterInfo, int[] pOutBufLen);
int sendARP(int destIP, int srcIP, byte[] pMacAddr, int[] PhyAddrLen);
}
public static void main(String[] args)
byte[] macAddress = new byte[6];
int[] length = {macAddress.length};
int result = CLibrary.INSTANCE.sendARP(192 << 24 ， 168 << 16 ， 1 << 8 ， 1, 0, macAddress, length);
if (result == 0)
StringBuilder macAddressBuilder = new StringBuilder(;
for (int i = 0; i < macAddress.length; i++)

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